Browsing by Subject "Cluster analysis"

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • No Thumbnail Available
    ItemOpen Access
    Characterization of Some Cultivated Rice (Oryza sativa L.) Based on Phenotypic, Physicochemical and Cooking Properties
    (University of North Bengal, 2022) Sarkar, Shukdeb; Sarkar, Jayita; Limboo, Sona; Yonzon, Bhumika T.; Roy, Subhas Chandra
    Evaluation of rice genetic diversity is an important step for character specific varietal development program. The present study characterizes 15 rice germplasm of Indian accessions on the basis of agro morphological, physicochemical and cooking parameters. The cultivars showed high degree of variations on their traits. Mean plant height of 88.96 cm, flag leaf length (26.48 cm), flag leaf width (1.17 cm), grain per panicle (130), panicle length (20.97 cm), days to 50% flowering (112.06 days), kernel length breadth ratio (2.65), cooked kernel length breadth ratio (3.25), linear elongation ratio (1.65). Out of 15 rice cultivars, only Sada nunia and Das nunia are aromatic rice and Sada nunia also contain awn. Plant height showed significant positive correlation with PnL and DF and significant negative correlation with GB. GL positively significantly correlates with FLL, GrWt with GL and GB, DF with MT. The cluster analysis grouped the 15 cultivars into 4 clusters with 37.5 dissimilarity coefficient. The high variability with promising traits among the cultivars expected to be significance for future rice breeding programmes.
  • Thumbnail Image
    ItemOpen Access
    Evaluation of genetic variation among fourteen rice (Oryza sativa L.) varieties (Landraces) of North Bengal using morphological traits
    (University of North Bengal, 2010-03) Roy, Subhas Ch.; Rakshit, Dipayan; Sengupta, Sandeepan
    The Northem region (North Bengal) of West Bengal possesses a rich genctic diversity of rice (Oryza sativa L).This region is known for growing one important rice variety Tulaipanji with GI number in the district of North Dinajpur and many other varieties of local landraces with tolerance to biotic and abiotic stresses. A considerable range of diversity and variation exists among the genetic resources of rice landraces of North Bengal. Prominent fourteen (14) landraces such as Sadanunia, Kalonunia, Dhepi, Banni, Dudkalam, Malsira, Lalpanati, Bhadoi, Ashami, and Gobindabhog, Enda, Chenga, Katharibhog, Tulaipanji are known for their special quality attributes were collected from the different districts of North Bengal. Genetic variation among these landraces was characterized by means of morphological traits such as seed sizes, shape, volume, colour, awn character, surface texture with husk (Microscopic observation) and pericurp colour. The Karl Pearson's simple matching coefficient was used to calculate the genetic diversity among the varieties. Similarity coefficient was ranged from 0.94 to 0.64 with an average of 0.79 among the 14 varieties. Clusier analysis based on genetic similarity of these varieties gave rise to three distinct groups The results suggested that the level of genetic diversity within this group of rice varieties of North Bengal was suficient for brecding programs and can be used to establish genetic relationships among them on the basis of morphological traits.